Investigations of Alterations of Membrane Responses to Dilofop as Machanism of Resistance in wild Oat

Abstract

Resistance to graminicide, diclofo-methyl, has recently apperared in wild oat (Avena Fatua and A. sterilis). The effects of diclofop on the plasma membrane potential wee investigated in herbicide resistant wild oat plants. The results indicated that wild oat had no correlation between resistance to graminicides and recovery of the plasma membrane potential. However, the the recovery of the plasma membrane potential is pH dependent with a sharp reflcetion point. Recovery in four biotypes, two resistant and two susceptible, potnetial following removal of herbicide and hervicide resistance in wild oat suggests repid recovery of the plama membrane potential is not ap pre-requisite for resistance.